who do they have on the investigation of chris christie? >>> a frantic rescue caught on tape after an avalanche roars through a neighborhood. why it's incredible anyone came out alive. >>> what the tax bill will be for the couple that found precious coins in their back yord. >>> good morning, everyone. welcome to weekends with alex witt. here's what's happening. we have developing news of president obama warning of consequences of military intervention inside ewe rain. he called on russia to exercise restraint after helicopters flew into crimea. it is a region in southern ukrai ukraine. here is what the president said in a late friday statement. >> days after the world came to russia after the olympic games, it would invite the nations around the world. indeed, the united states will stand with the international community in affirming there will be costs for military intervention in ukraine. >> meantime, gunmen described as russian troops to control key airports in crimea on friday. kristen welker is joining me to talk about this. good morn